Attachment for motion-picture machines



D. D. DANIEL.

ATTACHMENT FOR MOTION PICTURE MACHINES.

APPLICATION FILED sun. 18, 1919.

1,361,143. Patented Dec. 7, 1920.

3 SHEETS-SHEET I.

awuwm D. D DANIEL.

ATTACHMENT FOR MOTION PICTURE MACHINES. APPLICATION FILED SEP|.18, leis.

1,361, 143. Patented Dec. 7, 1920.

3 SHEETS-SHEET 2- ma/wtoz l7 Z7 17am?! D. D DANIEL.

ATTACHMENT FOR MOTION PICIURE MACHINES. APFLICAI'ION FILED SEPI. :8,1919.

1,361,143. Patented Dec. 7, 1920.

3 SHEETS-SHEET 3.

UNITED STATES PATENT OFFICE,

DOSSEY D. DANIEL, OF RICHMOND, VIRGINIA.

Specification of Letters Patent.

ATTACHMENT FOR MOTION-PICTURE MACHINES.

Patented Dec. 7, 1920.

v Application filed September 18, 1919. Serial No. 324,634.

To all whom it may concern.

Be it known that I, DOSSEY D. DANIEL, a citizen of the United States,residing at Richmond, in the county of Henrico and State of Virginia,have invented certain new and useful Im rovements in Attachments forMotionicture Machines, of which the following is a specification;reference being bad to the accompanying drawhis invention relates toattachments for motion picture machines and primarily it is an object ofthe invention to improve upon the structure particularly disclosed in myprior Patent No. 1,168,607, granted January A further object of theinvention is to provide a novel and improved attachment of this generalcharacter adapted for use in connection with a moving picture machine inwhich an electric motor is the power employed for driving the mechanism,and wherein the attachment is provided with -means whereby the machineis entirely safe cally operates to break the supply or'feed circuit forthe machine to both stop the motor and shut off the light in the eventof any pronounced irregularity in the travel of the film, such asbreakage or the like, or upon derangement of the driving connection fromthe motor;

An additional object of the invention is to provide a novel and improvedattachment of this general character wherein a controlling switch isinterposed in the main leads for the electrical system of the picturemachine, and wherein said main switch can be readily moved into closedposition under the influence of a subsidiary circuit, and wherein thefire shutter of the machine will be automatically moved to closedposition and the operating motor automatically stopped upon irregularityin the travel .of the film or upon derangement of the driving connectionbetween the motor and the machine.

The invention consists in the details of construction and in thecombination and ture machine with my improved attachment arrangement ofthe several parts of my improved attachments for motion picture machineswhereby certain important advan, tages are attained and the devicerendered simpler, less expensive and otherwise more convenient andadvantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitelyclaimed.

In order that my invention may be the better understood, I will nowproceed to depanying drawings, wherein:

Figure 1 is a schematic view illustrating an attachment constructed inaccordance with an embodiment of my invention;

scribe the same with reference to the accom- Fig. 2 is a fragmentaryview in side elevation of a conventional type of moving pic;

as herein embodied applied thereto;

Fig. 3 is a fragmentary view in elevation of the fire shutter and theoperating means I therefor, as herein included, a second position of theshutter being indicated by dotted lines;

Fig. 4 is an'enlarged fragmentary view in elevation illustratingthecircuit breaker as improved in my attachment, as herein disclosed, thedriving belt from the motor being indicated by the dotted lines;

Fig. 5 is a view in top plan of the structure illustrated in full linesin Fig. 4;

Fig. 6 is a fragmentary view partly in top plan and partly insection,illustrating in detail the mounting of the independently operablecontrolling members for the circuit breaker;

Fig. 7 is a sectional View taken substantially on the line 7-7 of Fig.5, and.

Fig. 8 is a'fragmentary'view in perspective of the movable contactcomprised in the circuit breaker, as herein disclosed.

In the schematic illustration of my invention as afforded by Fig. '1,(1' denotes conductors leading from a suitable source of electricalenergy, and preferablyfromthe circuit of the house or place ofexhibition. The leads a are operatively connected with a two pole switchS, of a conventional type, and which coacts in a convenient manner with.the stationary contacts 1.

M denotes the motor for driving in a well known manner the mechanism ofa moving picture machine, and preferably through a belt connectionindicated at 2in Fig. 4. The motor M is electricallyconnected with thethe present embodiment of my invention is held in a position below therays emitted from the nozzle N, so that no obstruction or hindrance willbe offered thereto. The arm 2 has operatively engaged therewith, preferably through the medium of the .elongation 3, the armature or core 4,comprised in the electromagnct a.

The magnet 5 is in electrical connection with the conductor a throughthe conductor (Z, also in proper electrical connection with the magnet 5is a conductor 6 leading to the movable contact 6 comprised in thecircuit breaker to be hereinafter more particularly referred to.

The stationary contact 7 has leading therefrom a conductor f withelectricalconnection with conductor 6 hereinbefore re ferred to.

In view of the foregoing it will be noted that when the motor circuit isclosed through the conductors b and c, a circuit will also be closedthrough the conductors (I, e and f when the contacts 6 and 7 are inengagement, so that the magnet 5 will be energized andthe armature movedto a position to swing the arm 2 to arrange the fire shutter 1* in thedesired position out of alinement with the rays of light emitted fromthe nozzle N.

8 denotes a second electromagnet having its core or armature 9operatively engaged with the switch S, and said electromagnet 8 isinterposed in a conductor or lead y connecting the conductor a and theconductor 6, so that when the circuit is closed through the contacts 6and 7 the switch S will be held in its closed position.

Interposed in the conductor g is a switch 10, preferably a push button,whereby the circuit which is initially closed through the contacts 6 and7 may be broken at the will of the operator.

Leading from the second conductor a to the conductor 9 is a lead orconductor i having interposed therein a switch 11, prefer ably a pushbutton, and which, when the switch S is in open position, is adapted tobe closed, in order to create the desired circuit through the conductors2' and g to momentarily energize the electromagnet 8, so that the switchS will be moved into closed position. It is to be understood that afterthe switch S has been moved into closed position by closing of theswitch 11, said switch S will be further maintained in closed positionthrough the circuit passing through the contacts 6 and '7.

Should the circuit through the contacts 6 and T be broken, andparticularly by movement of the contact (3 into open position, theswitch Swill automatically be moved into open position by gravity, or bya suitably positioned spring 12, preferably the latter.

It will also be understood that when the circuit is broken through thecontacts 6 and T the fire shutter F will move into a position directlybetween the nozzle X and the lens L, so that ignition of the film isprevented.

l uder normal condition, during the-operation of the machine, thecircuit is closed through the contacts (5 and 7, but in the event of anyirregularities in the travel of the film, such as breakage, undueslackage or tension, or from other causes, the movable contact 6 will bethrown into open position through a mechanism to be hereinafterdescribed. The mechanism to be described also includes a means wherebythe movable contact 6 will be thrown into open position upon derangementof the driving connection between the motor and the mechanism of themachine, and more particularly upon breaking or jumping off of the belt2, which is now generally employed in moving picture machines now inuse.

As is particularly illustrated in Fig. 3, the arm 2 of the fire shutteris supported intermediate its length for vertical swinging movement bythe upper end portion of a vertically disposed post 14, suitably mountedupon the base of the machine, although I do not wish to be understood aslimiting myself in this respect.

I also find it of advantage to employ in connection with the arm 2 atractile member 15, herein disclosed, as a coil spring, which operatesto further facilitate the mov: ing of the fire shutter F into Workingposition in the event of the circuit being broken through contacts 6 and7.

As is illustrated in Fig. 2 the switch S is suitably supported by theframe or base of the picture machine, although it can be located asbestmeets the occasions of practice, and said switch is provided with ahandle 16, so that said switch may be manually thrown into open orclosed position, as may be required.

As is particularly illustrated in Figs. 4 to 7, the stationary contact 7is carried by an insulating block 17, suitably aflixed to an arm 18,depending from an upstanding wing or flange 19. The wing or flange 19 iscarried by a plate 20. which is adapted to ,be suitably anchored uponthe base of the machine. Pivotally engaged with the wing or upwardly,with ries the movable contact I.

from the arm,l8 and 21 has affixed thereto an insulating block 22,jwhich' car- The pivoted 'end port onof is provided with an extens1on 23,preferablyg at right angles thereto, and

ing 1 down upon th ably arranged spring 24., The spr1ng124 op? contacts"6 to close the lcircuit'l crates to normally maintain the and 7 inengagement,

therethrough'.

The plate 201s piovided' with:

and said w ngs or flanges 19 -andw25 rotatiively support a tubi'ilar''shaft 26.'=-An end portion ofthe shaft 26 is provided with a cam member27, which underlies the extension 23,..sov that upon'rotation of theshaft 26 in one direc tion the cam 27 operates toswing theextension 23upwardly and the-contact 6 in a direction away from the contact 7, sothat the standing wing or flange 2:),

be broken. I

Extending through the tubular shaft 26 is a second shaft 28,-which isalso provided with a cam29 underlying theextension so that upon rotationof the shaft 28in one direction the cam 29 will also swing the eX-tension 23 upwardlysan'd 'therebymove the contact 6 out of engagementwith the contact 7 to break thecircuit through said contacts. Suitablyaffixed to the shaft .26 is an arm 30 provided with aroller 31 which isdisposed' within the loop of :the film 32. event the filmshould:stopfrom any cause. the slack 'will be substantially, instantly arawnoutof the film and the latter will engage the rollei great force,and-instantlyswing thearm 30 carried by the 6 and 7 and therebyconstantly beare extension 23 is a su t- 131'. with jcomparati velythezresult; that the cam 27 v shaft 26 ;will raise theex tension 23 andthereby separate the contacts break: the (llllllittherccircuitthrough'said: contacts 6 and 7 will i shelf 35.

.The arm ingstop pins 46v carried by the bearing 43, so that the armundue or unnecessary swinging movement. in the i 1 given when theprovided with a pair of. upstanding and. alined bearings 36, in'which isrotativel mounted a stub shaft 37. This stub sha t 37' is also-providedwith a cam 38 underlying the extension'23 of the arm 21, so that uponrotation'of the shaft BTinone direction the'c'am 38 will operate toswingthe extension 23' upwardly-and thereby, separate the f contacts 6 and-7to-break the circuit. therethrough '-The-stub shaft 37 is also prosvid'ed with an upstandingrock. arm 39; to which is pivotally engaged anvend portion of'a '-link' 40. The opposite end portion of the link e0 ispivotally engaged with an up;

standing rock arm 41 carried by; atsecond stub' shaft 42. Thesecond-stub shaft 42 is rotati'vely engaged with a bearing 43 car: ried'by an extension 44; of the,. table. or

Secured 'to and extending outwardly from the stub shaft 42 isancelongated rockarm 45 provided atits outer end portion witha roller46, which lies upon a stretch of the drivingbelt 2, which is inoperativeconnection with the motorM.x Should the belt become broken orotherwisederangedthe arm 45 will drop, resulting in sufficient rotation ofthe'stub shaft'37 to cause the cam 38 carried thereby to swing theextension 23 pwardlyand'thereby break the circuit bethe contacts 6 and7.

45 travels between tween v I Y.

the outstand- 45 is prevented from having In orderthat a suitable alarmmay be switch S is automatically fjnikn ed into open position I find itof advanithrou hj l 'ion breakin of this circuit'the" switch Swill"-auto'matically assume an open position,

so thatthe fire'yshutter will move into working position and the motorM. will he shaft- 28 has affixed thereto an, arm 33 carrying a roller34, which engagest 32. The roller 34 lies on the film 32, so that in theevent of the film breaking or becoming unduly slack the arm 33 will dropand thereby rock the shaft 28 in a direction to cause the cam 29 to,move the extension 23 upwardly to separate or open the contacts 6 and 7,

The wing .or flange 19, in the present em bodiment of my invention alsoextends below the plate 20, and the lower portion of said wing or flange1.) is provided with the outsubstantiallv horizontally disstanding andposed table or shelf 35. This table or shelf "tage to employ a posedtherein an audible signal 47, ably a bell, and a'visual signal l8, poreincludes the stationary crate, the same may he film having interprefer-.I erably" The circuit. In is normallyopeiuand spaced contact -19. Thecircuit is closed through the contacts 49 when theswitcli S is in openposition bythe contact 50 carried by said switch S. 1

Talso' find it of advantage to inter-pose in thejcircuit 7c the circuitcloser- 51 adapted to be manu'allyoperated, so that when it is notdesired to have the local circuit 7i;'-;op-,-.= be conveniently broken IFrom the foregoing description. it is thoughtto be obviousthat anattachment local circuit 7.:

a la mp;

for motion picture machines constructed in accordance with my inventionis particularly well adapted for use by reason of the convenience andfacility be assembledgind operated, and it will also beobvious that myinvention is susceptible of some change and modificationovithoutdeparting from the principles and spirit there of and for this reason Ido not wish to be understood as limiting myself to the precisearrangement and formation of the several parts hereln shown in carryingout my inwith which it may,

vention in practice except as hereinafter claimed.

I claim:

1. In a moving picture apparatus, the combination with a motor circuit;-of a switch interposed in the motor circuit and tending normally to moveinto open position, a shunt circuit leading from the motor circuit, anormally closed circuit breaker interposed in the shunt circuit, anelectromagnet interposed in a branch of the shunt circuit and coactingwith the switch to maintain the switch in closed position during theperiod the motor circuit is closed, a second shunt circuit leading froma branch of the motor circuit to a branch of the first named shuntcircuit, an electro-magnet interposed in said second shunt circuit, anda fire shutter operatively engaged with said last named electro-magnet,said electro-magnet, during the period the motor circuit is closed,operating to maintain the fire shutter in open position.

2. An attachment for a motor driven motion picture machine including aswitch controlling the motor circuit, said switch tending normally tomove into open circuit po sition, a shunt circuit coacting with themotor circuit, one branch of the shunt circuit being in communicationwith a branch of the motor circuit in advance of the switch, the secondbranch of'the shunt circuit being in connection with the motor circuitinwardly of the switch, an electro-magnet interposed in the first namedbranch of the shunt circuit and coacting with the switch to maintain theswitch in closed position during the period the motor circuit is closed,a circuit breaker interposed in the shunt circuit, said circuit breakercomprising two relatively movable contact members, means for normallymaintaining the contact members in engagement to closethe shunt circuitand energize the electro-magnet to maintain the motor circuit closed,and means cooperating with the driving connection with the motor andautomatically separating the contact members of the circuit breaker uponderangement of the driving connection with the motor.

3. An attachment for a motor driven mo.- tion picture machine includinga switch controlling the motor circuit, said switch tending normally tomove into open" circuit position, a shunt circuit coacting with themotor circuit, one branch of the shunt circuit being in communicationwith a branch of the motor circuit in advance of the switch, the secondbranch of the shunt circuit being in connection with the motor circuitinwardly of the switch, an electro-magnet in terposed in the first namedbranch of the shunt circuit and coacting with theswitch to maintain theswitch in closed position during the period the motor circuit is closed,a circuit breaker interposed in the shunt circuit, said circuit breakercomprising two relatively movable contact members normally in engagementto close the circuit, movable members mounted for actuation upon thestopping or breaking of thefilm, each of said members upon suchactuation operating to separate the contact members of the circuitbreaker.

4. An attachment for a motor driven motion picture machine including aswitch controlling the motor circuit, said switch tending normally tomove into open circuit position, a shunt circuit coacting with the motor80 in communication with a branch of the mocircuit, one branch of theshunt circuit being tor circuit in advance of the switch, the secondbranch of the shunt circuit being in connection with the motor circuitinwardly of the switch, an elect-ro-magnet interposed in the first namedbranch of the shunt circuit and coacting with the switch to maintain theswitch in closed position during the period. the motor circuit isclosed, a circuit breaker interposed in the shunt circuit, said circuitbreaker comprising two relatively movable contact members normally inengagement to close the circuit, movable memhers mounted for actuationupon the stopping or breaking of the film, each of said members, uponsuch actuation, operating to separate the contact members-of the circuitbreaker, and an additional movable member mounted for actuation upon de'angement of the driving connection between the motor and the mechanism,said last named member, upon such actuation, also operating to separatethe contact members of the circuit breaker.

-In testimony whereof I hereunto afiix my signature.

DOSSEY D. DANIEL.

